Dual-Screen LCD Power Control via Switched Supply
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Solution Overview
Problem
Conventional electronic devices with double screens face challenges in efficiently controlling and managing driving signals between the main and second screens, leading to increased energy consumption.
Innovation Solution
A liquid crystal display system comprising a main screen, a second screen, a driving circuit, a controlled switch, and a power source, where the power source supplies power directly to the main screen array substrate and through a controlled switch to the second screen array substrate, allowing the driving circuit to control the switch to turn the power on or off, enabling separate control of both screens and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If driving signals are sent to both main screen and second screen simultaneously, then both screens can work independently, but energy consumption increases
Solution Approach 1:
The patent implements dynamic control of the second screen's power state through a controlled switch. The driving circuit can dynamically transition the second screen between powered and unpowered states based on operational needs, allowing the system to adapt between full functionality and energy-saving modes. This dynamic approach resolves the contradiction by making the power supply state changeable rather than fixed.
Solution Approach 2:
The patent changes the power supply parameter of the second screen from a constant state to a variable state. By controlling the switch between connected and disconnected states, the power supply voltage parameter changes between present and absent, enabling the system to reduce energy consumption while maintaining the capability for independent screen control when needed.
2Use of energy by moving object
If a controlled switch is added to manage power supply to the second screen, then energy consumption can be reduced, but device complexity increases
Solution Approach 1:
The patent introduces a controlled switch as an intermediary component between the power source and the second screen. This switch acts as a mediator that can connect or disconnect the power supply path, enabling energy savings without requiring complex control systems. The switch simplifies the control architecture by providing a single-point control mechanism for power management.
Data Source
AI summary
The present disclosure discloses a liquid crystal display, including a main screen, a second screen, a driving circuit, a controlled switch and a power source, the second screen includes a second screen array substrate, the main screen includes a main screen array substrate, the power source provides a power supply signal to the main screen array substrate directly, and supplies a power signal to the second screen array substrate by the controlled switch, the driving circuit provides a first control signal to the controlled switch in order to turn off the controlled switch, by which the second screen array substrate obtains the power supply signal, or provides a second control signal to the controlled switch in order to turn off the controlled switch, by which the second screen array substrate fails to obtain the power supply signal.